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Home >> Chevrolet >> 2001 >> Venture Base, Van Passenger >> Repair and Diagnosis >> External Pages >> Different car >> Section 477 (HVAC Systems - Manual) >> Diagnostic Information and Procedures >> HVAC Compressor Clutch Does Not Engage >> Test Description

Test Description

WARNING: This page is about a different car, the 2003 Pontiac Aztek and 2003 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

  1. 2. The A/C compressor relay output is disabled if engine coolant temperature is above 121°C (250°F). The engine coolant indicator will illuminate at this temperature.
  2. 3. Place the mode switch in any position except OFF, and place the air temperature control switch in a cold setting. Use the bi-level mode for consistent testing of the A/C system operation.
  3. 6. The HVAC control module is inoperative if the module does not respond to any operator control requests.
  4. 40. The evaporator temperature sensor is replaced as part of the evaporator core.
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